akkoma/lib/pleroma/web/rich_media/parsers/o_embed.ex

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# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.RichMedia.Parsers.OEmbed do
def parse(html, _data) do
with elements = [_ | _] <- get_discovery_data(html),
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oembed_url when is_binary(oembed_url) <- get_oembed_url(elements),
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{:ok, oembed_data = %{"html" => html}} <- get_oembed_data(oembed_url) do
%{oembed_data | "html" => Pleroma.HTML.filter_tags(html)}
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else
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_e -> %{}
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end
end
defp get_discovery_data(html) do
html |> Floki.find("link[type='application/json+oembed']")
end
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defp get_oembed_url([{"link", attributes, _children} | _]) do
Enum.find_value(attributes, fn {k, v} -> if k == "href", do: v end)
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end
defp get_oembed_data(url) do
with {:ok, %Tesla.Env{body: json}} <- Pleroma.Web.RichMedia.Helpers.rich_media_get(url) do
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Jason.decode(json)
end
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end
end